I would love to see how they get away with that. I see it as "It is what it is" and slapping lipstick on a pig and selling it as though it's all on the up and up is just WRONG.
Have you researched VIN laws at all? What they're doing is perfectly legal. They own the frame and title from the original Bronco. They take that and rebuild the Bronco around the VIN. Nothing illegal or unscrupulous about it.